Hairpin walking cane



FIG. 1 is a perspective view of a hairpin walking cane.

FIG. 2 is a side view of the hairpin walking cane; and,

FIG. 3 is a front view of the hairpin walking cane.

The broken lines depict portions of the article that form no part of the claimed design. 

CLAIM I claim the ornamental design for a hairpin walking cane design, substantially as shown and described. 